Filter



FIG. 1 is an upper perspective view of the filter showing my design.

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is a side view thereof;

FIG. 5 is an opposite side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a perspective view showing attachment to a shower head.

The broken lines are for illustrative purposes and form no part of the claimed design. 

I claim the ornamental design for a filter, as shown and described. 